HORSEHEAD HLDG CORP

CUSIP: 440694305 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

Note: Option positions (PUT/CALL) are excluded.

Q4 2015
Shares 152,399 Value ($000) $312 Avg Close — Range —
Q3 2015
Shares 75,775 Value ($000) $230 Avg Close — Range —
Q2 2015
Shares 63,996 Value ($000) $750 Avg Close — Range —
Q1 2015
Shares 51,186 Value ($000) $648 Avg Close — Range —
Q4 2014
Shares 739 Value ($000) $12 Avg Close — Range —
Q3 2014
Shares 4,367 Value ($000) $72 Avg Close — Range —
Q1 2014
Shares 3,995 Value ($000) $67 Avg Close — Range —
Q4 2013
Shares 9,136 Value ($000) $148 Avg Close — Range —
Q3 2013
Shares 3,451 Value ($000) $43 Avg Close — Range —